Morning Flying on the19th of Feb. Cool sunny day mild wind about 7-12. I was out at the field about 12:30 Mark & Cloyce & Dennis were there already. Cloyce still seems to be having trouble with the Yak’s engine. Dennis had to go back home to get his transmitter. Mark flew his Stick 40 well many times. I flew the Katina having a bit of trouble getting the engine to stay running once airborne for a few minutes. We also had some trouble with Denise's engine once airborne today. Then the wind came up and the temp dropped so we all called it quits. Good day over all.